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DuPont Company, Patent Department records
E.I. du Pont de Nemours & Company is a chemical company, commonly referred to as the DuPont Company. It manufactured paints, dyes, and photographic products, and focused on applied research. This collection consists of materials related to patents and patent research. It includes patent proposal logs and patent search files from several DuPont Company departments related to photographic film and electronic products. The departments include: Photo Products, Electrochemical (Elchem), Electronics, Imaging Systems, and Photosystems and Electronics Department. This collection would be useful for examining research trends and patented product development.
Levy family business papers
Brothers Louis Edward Levy (1846-1919) and Max Levy (1857-1926) founded a photoengraving business in Baltimore in 1875. In 1877, they moved to Philadelphia and reorganized the firm as the Levytype Company. Here they introduced their invention (jointly patented on January 4, 1875) of a new photochemical engraving process, which they called "Levy-type." The bulk of the papers consists of incoming correspondence relating to orders and shipments from 1895 to 1920, and includes letters from all parts of the United States, Europe (especially England and Germany), and more distant places such as India, Australia, and Chile.
